16983-68-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 16983-68-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,9,8 and 3 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 16983-68:
(7*1)+(6*6)+(5*9)+(4*8)+(3*3)+(2*6)+(1*8)=149
149 % 10 = 9
So 16983-68-9 is a valid CAS Registry Number.